KR-02Pull the drawer out and check the old runnersPull the drawer fully open. Most runners let you lift the drawer slightly and slide it off the rails, sometimes with a small clip or lever to release a soft-close mechanism. Look at how the old runner is fixed to the cabinet side and to the drawer side, and note whether it's a simple roller type or a ball-bearing type, and whether it sits on the side of the drawer or underneath it.